986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Secondary Air System (the likely culprit?)

Lapister · 12-03-2016, 10:08 PM

To test functionality of shut open/off valve you need to pull off little hose at Combi valve put a hand vacuum tester to it then pull off SAI pump hose at motor and see if you can blow thru the valve. Release vacuum and then see if it's now obstructed when blowing in. The valve is just like a switch open/close.

By shutting off engine it would have automatically ended the SAI test. It only happens on cold starts. What was the code? Don't know on early models but on my 02 you either have to pull off the induction T or pull out alternator. Both a PIA.

12-03-2016, 10:08 PM	#4
Lapister Registered User Join Date: Dec 2014 Location: Pasadena Posts: 261	To test functionality of shut open/off valve you need to pull off little hose at Combi valve put a hand vacuum tester to it then pull off SAI pump hose at motor and see if you can blow thru the valve. Release vacuum and then see if it's now obstructed when blowing in. The valve is just like a switch open/close. By shutting off engine it would have automatically ended the SAI test. It only happens on cold starts. What was the code? Don't know on early models but on my 02 you either have to pull off the induction T or pull out alternator. Both a PIA. Last edited by Lapister; 12-03-2016 at 10:12 PM.